| Values for Old Faithful Area | 1978-09-25 |
|---|---|
| Astronomical Twilight Begin | 05:36 |
| Nautical Twilight Begin | 06:11 |
| Civil Twilight Begin | 06:45 |
| Sunrise | 07:13 |
| Sunset | 19:16 |
| Civil Twilight End | 19:44 |
| Nautical Twilight End | 20:18 |
| Astronomical Twilight End | 20:53 |
| Moon Illumination | 40.27% |